use strict;
use warnings;

my $word = q{test};
my $rxWord = qr{\b($word)\b};

while (<DATA>)
{
    next unless m{$rxWord};
    print qq{Match found on line $., column };
    while (m{$rxWord}g)
    {
        print qq{$-[0] };
    }
    print qq{\n};
}

__END__
This is a test from tester okay
nothing
message test center test
test in proress ... test one test two
a tester in this line